US6280099B1 - Optical fiber wavelength filter and manufacturing method for the same - Google Patents
Optical fiber wavelength filter and manufacturing method for the same Download PDFInfo
- Publication number
- US6280099B1 US6280099B1 US09/127,760 US12776098A US6280099B1 US 6280099 B1 US6280099 B1 US 6280099B1 US 12776098 A US12776098 A US 12776098A US 6280099 B1 US6280099 B1 US 6280099B1
- Authority
- US
- United States
- Prior art keywords
- ferrules
- pair
- optical fiber
- adhesive agent
- multilayer film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
- G02B6/29361—Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters
- G02B6/2937—In line lens-filtering-lens devices, i.e. elements arranged along a line and mountable in a cylindrical package for compactness, e.g. 3- port device with GRIN lenses sandwiching a single filter operating at normal incidence in a tubular package
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
- G02B6/3818—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type
- G02B6/3822—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type with beveled fibre ends
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3873—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
- G02B6/3881—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using grooves to align ferrule ends
Definitions
- FIG. 4 is a cross-sectional view showing the optical fiber wavelength filter.
- the present invention has been made with a view toward solving the problems described above, and it is an object thereof to provide an optical fiber wavelength filter which is superior to the conventional ones described above in optical properties.
- Said thin multilayer film filter has a thickness of approximately 10 to 40 ⁇ m including the substrate for forming said dielectric multilayer film, and the exterior of said multilayer film filter lies within the joint surface of said ferrules when it is bonded.
- FIG. 2 is a longitudinal sectional view illustrating the manufacturing process of the embodiment
- the optical fiber wavelength filter in accordance with this embodiment is constituted by: a pair of glass ferrules 1 and 2 with optical fibers 3 and 4 of optical fiber cables 5 and 6 ; a thin-film filter 9 ; an adhesive agent (not shown) which has been hardened by ultraviolet rays; hoods 7 and 8 ; and a protective pipe 10 .
- the distal ends of the glass ferrules 1 and 2 have been ground with an angle of 6 degrees or more to minimize the feedback light attributable to Fresnel reflection at the boundary surface.
- the thin-film filter 9 may use the thin dielectric multilayer film filter, having a thickness of 10-40 ⁇ m including the substrate of polymide, manufactured by the method described above as the prior art.
- the filter may have any of the following wavelength properties: a short-wavelength type that passes light waves of short wavelengths, a long-wavelength type that passes those of long wavelengths, or a bandpass type that passes those of a particular wavelength.
- the hoods 7 and 8 are made of rubber or plastics to provide resilience.
- the hoods 7 and 8 function to secure the roots of the glass ferrules with the optical fibers with respect to the protective pipe 10 in order to safety house the optical fiber wavelength filter in the protective pipe 10 ; they do not function to align optical axes.
- These hoods 7 and 8 also serve to protect the ferrule connections of the optical fiber cables 5 and 6 .
- the protective pipe 10 uses a stainless pipe; it may, however, use a resinous pipe.
- the optical fiber wavelength filter shown as the embodiment has an extremely simple structure, it provides high performance in which the insertion loss is 0.5 dB or less and the return loss is 55 dB or more.
- FIG. 2 is a longitudinal sectional view illustrating the manufacturing process of the embodiment
- FIG. 3 is a cross-sectional view thereof.
- optical fiber cables 5 and 6 are inserted in and bonded to the ferrules 1 and 2 in such a manner that the optical fibers 3 and 4 at the distal ends thereof are exposed so that they may be ground.
- the distal ends are ground with an angle.
- the ferrules with the optical fibers which have been ground are supported using a support member for aligning optical axes in order to align the optical axes of the optical fibers.
- a V-groove support member 13 that provides a V-groove surface common to the pair of ferrules 1 and 2 is used; V-groove surfaces 15 A and 16 A are made flush, while V-groove surfaces 15 B and 16 B are made flush.
- the ferrule 1 is supported by the V-groove surfaces 15 A and 15 B, while the ferrule 2 is supported by the V-groove surfaces 16 A and 16 B.
- the thin multilayer film filter 9 and ultraviolet-curing resin adhesive agents 11 and 12 are disposed between the ferrules 1 and 2 , and the optical axes are aligned while lightly pushing them from above as indicated by the arrows.
- the distal ends of the optical fibers are pressed into contact while pushing the ferrules in the direction indicated by the arrows in FIGS. 2 and 3, and one or both of the ferrules are turned to match the joint surfaces.
- the V-groove matched to the joint position of the ferrules 1 and 2 supported by the V-groove support member 13 is removed; instead, a clearance groove 14 is provided.
- a pair of adjustable stages with aligning V-grooves may be used instead of the aligning V-groove jig with the clearance groove 14 for relieving extra adhesive agent, and one or both of the stages may be three-dimensionally moved to achieve alignment with minimized insertion loss by making adjustment while measuring the properties of the optical fiber wavelength filter such as insertion loss by using an optical power meter.
- ultraviolet rays are irradiated from outside to expose the adhesive agents between the pair of ferrules 1 and 2 to the ultraviolet rays so as to instantly fix the pair of ferrules 1 and 2 and the thin-film filter 9 into one piece.
- the filter could be used as it is, or the hoods may be covered on both ferrules and housed in the protective pipe 10 as illustrated in FIG. 1 .
- the distal ends of the ferrules have been ground with an angle; however, they may alternatively be ground at right angles. Even if ground surfaces of the ferrules may be spherical rather than plane, there should be no problem because the gap is filled with an adhesive agent for fixation.
- both ferrules are transparent to ultraviolet rays in the embodiment, it is not required that both ferrules be transparent; at least one of them needs to be transparent because all that is necessary is to let sufficient light reach the joint surface to cure the adhesive agent.
- the present invention makes it possible to provide a high-performance optical fiber wavelength filter at lower cost.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
- Light Guides In General And Applications Therefor (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
An optical fiber wavelength filter which has superior optical properties and a manufacturing method for the same are disclosed. The optical fiber wavelength filter is composed of: a pair of glass ferrules which are transparent to ultraviolet rays and which are provided with optical fibers; and a thin dielectric multilayer film filter fixed between the distal ends of the ferrules. To manufacture the optical fiber wavelength filter, the optical fibers are bonded and secured to the pair of glass ferrules which are transparent to ultraviolet rays and the end surfaces thereof are ground. Then, the multilayer film filter and an adhesive agent which is hardened by the ultraviolet rays are disposed between the distal ends of the ferrules with the optical fibers, and the optical axes are aligned using a V-groove aligning jig. Upon completion of the optical axis alignment, ultraviolet rays are irradiated from outside to cure the adhesive agent to instantly fix the filter integrally to the distal ends of the pair of ferrules while the aligned ferrule are kept mounted on the V-grooved aligning jig.
Description
1. Field of the Invention
The present invention relates to an optical fiber wavelength filter employed for selecting an optical wavelength in an optical fiber communication or an optical measurement system, and a manufacturing method for the same.
2. Description of the Related Art
The U.S. Pat. No. 5,706,379 has disclosed an optical fiber wavelength filter that employs a multilayer dielectric film filter formed on a glass substrate; FIG. 4 is a cross-sectional view showing the optical fiber wavelength filter.
This prior art has been posing a problem in that the use of the glass substrate filter 25, in which thickness t is normally a few hundred μm (≧300 μm), causes transmitted light to be refracted by the glass substrate or mode field diffusion to take place. The optical axis of the refracted light is inevitably displaced from the central axis of the ferrules.
The mechanical central axes of the ceramic ferrules with optical fibers are aligned by the inside diameter of the aligning sleeve and the misalignment of the optical axis of the transmitted light caused by the refraction can hardly be corrected. The results of the experiments carried out by the inventor have revealed that, when thickness t of the glass substrate filter is 300 μm, the measured value of the insertion loss is approximately 7 dB mainly due to the dislocated optical axis, or when the thickness is 500 μm, the insertion loss is approximately 9 dB. This means that it is difficult to control the insertion loss in this wavelength filter. In addition, a thermosetting adhesive agent is usually used in manufacturing the optical fiber wavelength filters employing the aforesaid aligning sleeves; this type of adhesive agent typically requires at least a few tens of minutes to completely harden.
The U.S. Pat. No. 5,234,772 has disclosed a dielectric multilayer film filter and a manufacturing method for the same. The optical fiber wavelength filter employs a filter composed of a dielectric multilayer film formed on a fluorinated polyimide thin film (hereinafter referred to as “thin-film filter”). The filter produced according to this process has an extremely thin wavelength filter owing to the use of the fluorinated polyimide thin film; hence, this filter is free from the deterioration in the optical properties resulting from the use of the thick glass substrate filter mentioned above.
FIG. 5 is a top plan view of an optical fiber wavelength filter employing the conventional thin-film filter; and FIG. 6 is a longitudinal sectional view of a wavelength filter employing the conventional thin-film filter.
It is necessary to provide the substrate 30, the substrate with optical fibers, the zirconia ferrule, or the like with the groove wherein the thin-film filter is disposed; it is not easy, however, to precisely form the groove having a width of about a few tens of μm. The variations in the machining dimension of the groove width directly affect the properties of the wavelength filter and lead to the variations in the optical properties such as insertion loss of the wavelength filter. Furthermore, the end surfaces of the optical fibers that are cut apart at the time of making the groove for holding the thin-film filter cannot be ground, so that the irregular reflection of light may take place on the connection end surfaces with consequent deterioration in optical properties.
Thus, the conventional optical fiber wavelength filters have many problems in the manufacturing process or optical properties.
Accordingly, the present invention has been made with a view toward solving the problems described above, and it is an object thereof to provide an optical fiber wavelength filter which is superior to the conventional ones described above in optical properties.
Another object of the present invention is to provide a manufacturing method for the optical fiber wavelength filter.
In order to achieve the above objects, there is provided an optical fiber wavelength filter comprising a pair of ferrules aligned each with other on a V-grooved support member, each having a distal end surface slanted at an angle predetermined with respect to the optical axis thereof, each one of which is composed of a material transparent to a light ray containing a particular wavelength component, a pair of optical fibers and the supported by said ferrules, wherein said and the distal end surfaces are grounded together with the end surfaces of said ferrules and polished at said predetermined angle, a thin dielectric multilayer film filter disposed between the polished distal end surfaces of said ferrules, and an adhesive agent put on the surfaces of said pair of ferrules and said thin dielectric multilayer film filter which is cured by irradiating said pair of ferrules and said dielectric multilayer film filter at the same time with a light ray containing said particular wavelength component while both said pair of ferrules and said dielectric multilayer film filter are kept mounted on said V-grooved support member, and is solidified thereat.
Said light ray containing said particular wavelength component is an ultraviolet ray, said adhesive agent is an ultraviolet-curing resin adhesive agent, and said pair of ferrules are glass ferrules which are kept mounted on said V-grooved support member while said adhesive agent is being cured.
Said thin multilayer film filter has a thickness of approximately 10 to 40 μm including the substrate for forming said dielectric multilayer film, and the exterior of said multilayer film filter lies within the joint surface of said ferrules when it is bonded.
The distal ends of said ferrules are slant ground surfaces of 6 degrees or more.
There is also provided a manufacturing method for an optical fiber wavelength filter, comprising the steps of preparing a pair of ferrules aligned with each other on a V-grooved support member, each having a distal end surface slanted at an angle predetermined with respect to the optical axis thereof, each of which is composed of a material transparent to a light ray containing a particular wavelength component, bonding and securing optical fibers to said ferrules and grinding and polishing the distal end surfaces thereof at said predetermined angle, providing a thin multilayer film filter and an adhesive agent to be cured and hardened by a light ray containing said particular wavelength component, between the distal end surfaces of said ferrules, and performing optical axis alignment for said pair of ferrules on an optical axis aligning support member which supports said ferrules and permits the adjustment of relative positions among said pair of ferrules and said thin multilayer film filter, and irradiating said adhesive agent between the distal and surfaces of said pair of ferrules with a light ray containing said particular wavelength component from outside upon completion of said optical axis alignment until said pair of ferrules and said thin multilayer film filter are fastened to one piece.
Said light ray containing said particular wavelength component is an ultraviolet ray, said adhesive agent is an ultraviolet-curing resin adhesive agent, and said ferrules are glass ferrules which are kept mounted on said optical axis aligning support member while said adhesive agent is being cured.
Said pair of ferrules are the ferrules having substantially the same outside diameter and said optical axis aligning support member is a V-grooved support member which provides a common V-grooved surface to said pair of ferrules.
A portion corresponding to the joining position of said ferrules supported by said V-grooved support member is provided with a clearance groove.
The V-grooved matched to the joint position of the ferrules supported by the V-grooved support member is removed and a clearance groove is provided. This allows extra adhesive agent to be relieved, makes it easier to observe the joint condition, and permits ultraviolet rays to be irradiated sideways.
FIG. 1 is a longitudinal sectional view showing an embodiment of the optical fiber wavelength filter in accordance with the present invention;
FIG. 2 is a longitudinal sectional view illustrating the manufacturing process of the embodiment;
FIG. 3 is a cross-sectional view illustrating the manufacturing process of the embodiment;
FIG. 4 is a longitudinal sectional view showing an optical fiber wavelength filter that employs a conventional glass plate;
FIG. 5 is a top plan view showing an optical fiber wavelength filter that employs a conventional thin-film filter; and
FIG. 6 is a longitudinal sectional view showing a wavelength filter that employs the conventional thin-film filter.
An embodiment of the apparatus in accordance with the present invention will be described mainly with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of the optical fiber wavelength filter in accordance with the present invention.
The optical fiber wavelength filter in accordance with this embodiment is constituted by: a pair of glass ferrules 1 and 2 with optical fibers 3 and 4 of optical fiber cables 5 and 6; a thin-film filter 9; an adhesive agent (not shown) which has been hardened by ultraviolet rays; hoods 7 and 8; and a protective pipe 10.
The distal ends of the glass ferrules 1 and 2 have been ground with an angle of 6 degrees or more to minimize the feedback light attributable to Fresnel reflection at the boundary surface. The thin-film filter 9 may use the thin dielectric multilayer film filter, having a thickness of 10-40 μm including the substrate of polymide, manufactured by the method described above as the prior art. The filter may have any of the following wavelength properties: a short-wavelength type that passes light waves of short wavelengths, a long-wavelength type that passes those of long wavelengths, or a bandpass type that passes those of a particular wavelength.
The hoods 7 and 8 are made of rubber or plastics to provide resilience. The hoods 7 and 8 function to secure the roots of the glass ferrules with the optical fibers with respect to the protective pipe 10 in order to safety house the optical fiber wavelength filter in the protective pipe 10; they do not function to align optical axes. These hoods 7 and 8 also serve to protect the ferrule connections of the optical fiber cables 5 and 6. The protective pipe 10 uses a stainless pipe; it may, however, use a resinous pipe. Although the optical fiber wavelength filter shown as the embodiment has an extremely simple structure, it provides high performance in which the insertion loss is 0.5 dB or less and the return loss is 55 dB or more.
The manufacturing method for the embodiment of the optical fiber wavelength filter will now be described. FIG. 2 is a longitudinal sectional view illustrating the manufacturing process of the embodiment, and FIG. 3 is a cross-sectional view thereof.
Step for Preparing a Pair of Ferrules
A pair of ferrules is prepared; at least one of them is made of a material transparent to a light ray that includes a particular wavelength component. In this embodiment, the light ray which includes the particular wavelength component is an ultraviolet ray, and an ultraviolet-curing resin adhesive agent is used as the adhesive agent to make both glass ferrules 1 and 2 transparent to ultraviolet rays. Incidentally, the glass ferrules have the same outside diameter.
Polishing Step
The optical fiber cables 5 and 6 are inserted in and bonded to the ferrules 1 and 2 in such a manner that the optical fibers 3 and 4 at the distal ends thereof are exposed so that they may be ground. In this embodiment, the distal ends are ground with an angle.
Step for Aligning the Optical Axes
The ferrules with the optical fibers which have been ground are supported using a support member for aligning optical axes in order to align the optical axes of the optical fibers.
As the optical axis aligning support member, a V-groove support member 13 that provides a V-groove surface common to the pair of ferrules 1 and 2 is used; V- groove surfaces 15A and 16A are made flush, while V-groove surfaces 15B and 16B are made flush. The ferrule 1 is supported by the V-groove surfaces 15A and 15B, while the ferrule 2 is supported by the V- groove surfaces 16A and 16B. Under this condition, the thin multilayer film filter 9 and ultraviolet-curing resin adhesive agents 11 and 12 are disposed between the ferrules 1 and 2, and the optical axes are aligned while lightly pushing them from above as indicated by the arrows. The distal ends of the optical fibers are pressed into contact while pushing the ferrules in the direction indicated by the arrows in FIGS. 2 and 3, and one or both of the ferrules are turned to match the joint surfaces. The V-groove matched to the joint position of the ferrules 1 and 2 supported by the V-groove support member 13 is removed; instead, a clearance groove 14 is provided.
Providing the clearance groove 14 allows extra adhesive agent to be relieved, makes it easier to observe the joint condition, and permits ultraviolet rays to be irradiated sideways. A pair of adjustable stages with aligning V-grooves may be used instead of the aligning V-groove jig with the clearance groove 14 for relieving extra adhesive agent, and one or both of the stages may be three-dimensionally moved to achieve alignment with minimized insertion loss by making adjustment while measuring the properties of the optical fiber wavelength filter such as insertion loss by using an optical power meter.
Irradiating and Fixing Step
Upon completion of the optical axis alignment, ultraviolet rays are irradiated from outside to expose the adhesive agents between the pair of ferrules 1 and 2 to the ultraviolet rays so as to instantly fix the pair of ferrules 1 and 2 and the thin-film filter 9 into one piece. This completes the manufacture of the basic section of the optical fiber wavelength filter. The filter could be used as it is, or the hoods may be covered on both ferrules and housed in the protective pipe 10 as illustrated in FIG. 1.
It is apparent that widely different modifications of the embodiment which has been described in detail above can be formed on the basis of the present invention without departing from the spirit and scope of the invention. In the above embodiment, the distal ends of the ferrules have been ground with an angle; however, they may alternatively be ground at right angles. Even if ground surfaces of the ferrules may be spherical rather than plane, there should be no problem because the gap is filled with an adhesive agent for fixation.
Although both ferrules are transparent to ultraviolet rays in the embodiment, it is not required that both ferrules be transparent; at least one of them needs to be transparent because all that is necessary is to let sufficient light reach the joint surface to cure the adhesive agent.
Instead of using the rubber hoods in the embodiment shown in FIG. 1, the roots of the ferrules and the fiber cables may be wrapped with a heat-shrinkable tube and this assembly may be inserted and bonded in a protective pipe.
The optical fiber wavelength filter in accordance with the present invention has a simple construction and it permits easier optical axis alignment and easier manufacture.
Thus, the present invention makes it possible to provide a high-performance optical fiber wavelength filter at lower cost.
Claims (7)
1. An optical fiber wavelength filter comprising:
a pair of ferrules aligned with each other on a V-grooved support member, each having a distal end surface slanted at an angle predetermined with respect to the optical axis thereof, and each of which is composed of a material transparent to a light ray containing a particular wavelength component;
a pair of optical fibers supported by said ferrules and having end surfaces, wherein said distal end surfaces of said optical fibers are ground together with the end surfaces of said ferrules and polished at said predetermined angle;
a thin dielectric multilayer film filter disposed between the polished distal end surfaces of said ferrules; and
an adhesive agent put on the surfaces of said pair of ferrules and said thin dielectric multilayer film filter, which is cured by irradiating said pair of ferrules and said dielectric multilayer film filter at the same time with a light ray containing said particular wavelength component, while both said pair of ferrules and said dielectric multilayer film filter are kept mounted on said V-grooved support member, and is solidified thereat.
2. An optical fiber wavelength filter according to claim 1, wherein said light ray containing said particular wavelength component is an ultraviolet ray, said adhesive agent is an ultraviolet-curing resin adhesive agent, and said pair of ferrules are glass ferrules which are kept mounted on said V-grooved support member while said adhesive agent is being cured.
3. An optical fiber wavelength filter according to claim 1, wherein said thin multilayer film filter has a thickness of approximately 10 to 40 μm including the substrate for forming said dielectric multilayer film, and the exterior of said multilayer film filter lies within the joint surfaces of said ferrules when it is bonded.
4. An optical fiber wavelength filter according to claim 1, wherein the distal ends of said ferrules are slant ground surfaces of 6 degrees or more.
5. A manufacturing method for an optical fiber wavelength filter, comprising the steps of:
preparing a pair of ferrules aligned with each other on a V-grooved support member, each having a distal end surface slanted at an angle predetermined with respect to the optical axis thereof, each which is composed of a material transparent to a light ray containing a particular wavelength component;
bonding and securing optical fibers to said ferrules, and grinding and polishing the distal end surfaces thereof at said predetermined angle;
providing a thin multilayer film filter and an adhesive agent to be cured and hardened by a light ray containing said particular wavelength component, between the distal end surfaces of said ferrules, and performing optical axis alignment for said pair of ferrules on an optical axis aligning support member which supports said ferrules and permits the adjustment of relative positions among said pair of ferrules and said thin multilayer film filter; and
irradiating said adhesive agent between the distal end surfaces of said pair of ferrules with a light ray containing said particular wavelength component from outside upon completion of said optical axis alignment until said pair of ferrules and said thin multilayer film filter are fastened to one piece.
6. A manufacturing method for an optical fiber wavelength filter according to claim 5, wherein said light ray containing said particular wavelength component is an ultraviolet ray, said adhesive agent is an ultraviolet-curing resin adhesive agent, and said ferrules are glass ferrules, which are kept mounted on said optical axis aligning support member while said adhesive agent is being cured.
7. A manufacturing method for an optical fiber wavelength filter according to claim 5, wherein said pair of ferrules are the ferrules having substantially the same outside diameter, and said optical axis aligning support member is a V-grooved support member which provides a common V-grooved surface to said pair of ferrules.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10128963A JPH11326641A (en) | 1998-05-12 | 1998-05-12 | Optical fiber wavelength filter and its production |
JP10-128963 | 1998-05-12 |
Publications (1)
Publication Number | Publication Date |
---|---|
US6280099B1 true US6280099B1 (en) | 2001-08-28 |
Family
ID=14997753
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/127,760 Expired - Fee Related US6280099B1 (en) | 1998-05-12 | 1998-07-31 | Optical fiber wavelength filter and manufacturing method for the same |
Country Status (4)
Country | Link |
---|---|
US (1) | US6280099B1 (en) |
EP (1) | EP0957379B1 (en) |
JP (1) | JPH11326641A (en) |
DE (1) | DE69924051T2 (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6417963B1 (en) * | 1997-02-14 | 2002-07-09 | Nippon Telegraph And Telephone Corporation | Optical fiber splicing structure |
US6434283B2 (en) * | 1997-03-13 | 2002-08-13 | Litton Systems, Inc. | In-line fiber-optic polarizer |
US20020181864A1 (en) * | 2001-05-10 | 2002-12-05 | U-Conn Technology Inc | Device and method for measuring angle of slant surface of an optical component |
US20030138198A1 (en) * | 2002-01-09 | 2003-07-24 | Volker Plickert | Configuration for coupling optical signals of at least one optical data channel into and/or out of an optical waveguide |
US20030142923A1 (en) * | 2002-01-30 | 2003-07-31 | Chiaro Networks Ltd. | Fiberoptic array |
US20030156786A1 (en) * | 2002-02-20 | 2003-08-21 | Lightwaves 2020, Inc. | Miniature fiberoptic filter and method of manufacture therefor |
US6623174B2 (en) * | 2000-10-12 | 2003-09-23 | Tyco Electronics Corporation | Optical connector |
US20040223682A1 (en) * | 2003-05-06 | 2004-11-11 | Yi Ding | Hybrid optical circuits with thin film filters |
US20050282470A1 (en) * | 2004-06-16 | 2005-12-22 | Cabot Microelectronics Corporation | Continuous contour polishing of a multi-material surface |
US20060104322A1 (en) * | 2004-11-18 | 2006-05-18 | Park Mahn Y | Temperature-independent external cavity laser |
US20090263123A1 (en) * | 2008-04-21 | 2009-10-22 | Oplink Communications, Inc. | Fiber network monitoring |
US20110103741A1 (en) * | 2009-11-02 | 2011-05-05 | Harris Corporation | Optical fiber switch including an index matching elastomeric solid layer providing core and cladding index of refraction matching and related methods |
US20110103745A1 (en) * | 2009-11-02 | 2011-05-05 | Harris Corporation | Repeatable optical waveguide interconnection including an index matching elastomeric solid layer and related methods |
US20110103740A1 (en) * | 2009-11-02 | 2011-05-05 | Harris Corporation Corporation Of The State Of Delaware | Optical fiber switch including an index matching elastomeric solid layer and related methods |
CN103217745A (en) * | 2012-01-19 | 2013-07-24 | 王辉文 | Optical filter used for PON link monitoring in FTTH and manufacturing process of optical filter |
US9651737B2 (en) | 2015-09-24 | 2017-05-16 | Harris Corporation | Optical communication system having filter with index selectable material and related methods |
CN108885312A (en) * | 2016-03-24 | 2018-11-23 | 住友电气工业株式会社 | Optical connector ferrule, optical conenctor and optical coupling structure |
US10473860B1 (en) * | 2018-05-11 | 2019-11-12 | Alliance Fiber Optic Products, Inc. | Compact devices for multiplexing applications |
US10901156B2 (en) * | 2016-09-27 | 2021-01-26 | Afl Telecommunications Llc | Optical fiber adapters and connectors having wavelength filtering components |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100401805B1 (en) * | 2001-04-09 | 2003-10-17 | (주) 래트론 | Tunable optical filter |
CN103676014B (en) * | 2012-09-05 | 2015-09-09 | 武汉隽龙科技有限公司 | There is the SC type fiber adapter manufacturing process of light filter function |
US9442005B2 (en) | 2014-07-30 | 2016-09-13 | Corning Optical Communications LLC | Non-contact methods of measuring insertion loss in optical fiber connectors |
KR101953281B1 (en) * | 2016-07-19 | 2019-02-28 | (주)파이버피아 | Sensing system using optical fiber sensor for without error induced by installation or circumstance |
KR102526704B1 (en) * | 2020-07-23 | 2023-04-28 | 옵티시스 주식회사 | Optical connector for bi-directional communication |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5208886A (en) * | 1990-01-17 | 1993-05-04 | At&T Bell Laboratories | Methods of making an optical fiber filter |
US5234772A (en) | 1990-02-13 | 1993-08-10 | Nippon Telegraph And Telephone Corporation | Dielectric multilayer, filter, manufacturing method therefor, and optical element incorporating the same |
US5706379A (en) | 1994-09-28 | 1998-01-06 | Sirti S.P.A. | Optical filter for telecommunications |
US5892582A (en) * | 1996-10-18 | 1999-04-06 | Micron Optics, Inc. | Fabry Perot/fiber Bragg grating multi-wavelength reference |
US6002819A (en) * | 1996-11-21 | 1999-12-14 | Sumitomo Electric Industries, Ltd. | Optical switch and switching method |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3099167B2 (en) * | 1994-06-14 | 2000-10-16 | セイコーインスツルメンツ株式会社 | Optical communication components with built-in optical filters |
EP0934501B1 (en) * | 1996-10-18 | 2005-05-04 | Micron Optics, Inc. | A multi-wavelength reference |
-
1998
- 1998-05-12 JP JP10128963A patent/JPH11326641A/en active Pending
- 1998-07-31 US US09/127,760 patent/US6280099B1/en not_active Expired - Fee Related
-
1999
- 1999-03-02 EP EP99104149A patent/EP0957379B1/en not_active Expired - Lifetime
- 1999-03-02 DE DE69924051T patent/DE69924051T2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5208886A (en) * | 1990-01-17 | 1993-05-04 | At&T Bell Laboratories | Methods of making an optical fiber filter |
US5234772A (en) | 1990-02-13 | 1993-08-10 | Nippon Telegraph And Telephone Corporation | Dielectric multilayer, filter, manufacturing method therefor, and optical element incorporating the same |
US5706379A (en) | 1994-09-28 | 1998-01-06 | Sirti S.P.A. | Optical filter for telecommunications |
US5892582A (en) * | 1996-10-18 | 1999-04-06 | Micron Optics, Inc. | Fabry Perot/fiber Bragg grating multi-wavelength reference |
US6002819A (en) * | 1996-11-21 | 1999-12-14 | Sumitomo Electric Industries, Ltd. | Optical switch and switching method |
Cited By (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6417963B1 (en) * | 1997-02-14 | 2002-07-09 | Nippon Telegraph And Telephone Corporation | Optical fiber splicing structure |
US6434283B2 (en) * | 1997-03-13 | 2002-08-13 | Litton Systems, Inc. | In-line fiber-optic polarizer |
US6623174B2 (en) * | 2000-10-12 | 2003-09-23 | Tyco Electronics Corporation | Optical connector |
US20020181864A1 (en) * | 2001-05-10 | 2002-12-05 | U-Conn Technology Inc | Device and method for measuring angle of slant surface of an optical component |
US6795612B2 (en) * | 2001-05-10 | 2004-09-21 | U-Conn Technology Inc. | Device and method for measuring angle of slant surface of an optical component |
US20030138198A1 (en) * | 2002-01-09 | 2003-07-24 | Volker Plickert | Configuration for coupling optical signals of at least one optical data channel into and/or out of an optical waveguide |
US6999661B2 (en) * | 2002-01-09 | 2006-02-14 | Infineon Technologies Ag | Configuration for coupling optical signals of at least one optical data channel into and/or out of an optical waveguide |
US20030142923A1 (en) * | 2002-01-30 | 2003-07-31 | Chiaro Networks Ltd. | Fiberoptic array |
US20030156786A1 (en) * | 2002-02-20 | 2003-08-21 | Lightwaves 2020, Inc. | Miniature fiberoptic filter and method of manufacture therefor |
US6813416B2 (en) * | 2002-02-20 | 2004-11-02 | Lightwaves 2020, Inc. | Miniature fiberoptic filter and method of manufacture therefor |
US20040223682A1 (en) * | 2003-05-06 | 2004-11-11 | Yi Ding | Hybrid optical circuits with thin film filters |
US20050282470A1 (en) * | 2004-06-16 | 2005-12-22 | Cabot Microelectronics Corporation | Continuous contour polishing of a multi-material surface |
US7198549B2 (en) | 2004-06-16 | 2007-04-03 | Cabot Microelectronics Corporation | Continuous contour polishing of a multi-material surface |
US20060104322A1 (en) * | 2004-11-18 | 2006-05-18 | Park Mahn Y | Temperature-independent external cavity laser |
US20090263123A1 (en) * | 2008-04-21 | 2009-10-22 | Oplink Communications, Inc. | Fiber network monitoring |
US8195016B2 (en) * | 2009-11-02 | 2012-06-05 | Harris Corporation | Optical fiber switch including an index matching elastomeric solid layer and related methods |
US20110103745A1 (en) * | 2009-11-02 | 2011-05-05 | Harris Corporation | Repeatable optical waveguide interconnection including an index matching elastomeric solid layer and related methods |
US20110103740A1 (en) * | 2009-11-02 | 2011-05-05 | Harris Corporation Corporation Of The State Of Delaware | Optical fiber switch including an index matching elastomeric solid layer and related methods |
US8137001B2 (en) * | 2009-11-02 | 2012-03-20 | Harris Corporation | Repeatable optical waveguide interconnection including an index matching elastomeric solid layer and related methods |
US8175426B2 (en) * | 2009-11-02 | 2012-05-08 | Harris Corporation | Optical fiber switch including an index matching elastomeric solid layer providing core and cladding index of refraction matching and related methods |
US20110103741A1 (en) * | 2009-11-02 | 2011-05-05 | Harris Corporation | Optical fiber switch including an index matching elastomeric solid layer providing core and cladding index of refraction matching and related methods |
CN103217745A (en) * | 2012-01-19 | 2013-07-24 | 王辉文 | Optical filter used for PON link monitoring in FTTH and manufacturing process of optical filter |
US9651737B2 (en) | 2015-09-24 | 2017-05-16 | Harris Corporation | Optical communication system having filter with index selectable material and related methods |
CN108885312A (en) * | 2016-03-24 | 2018-11-23 | 住友电气工业株式会社 | Optical connector ferrule, optical conenctor and optical coupling structure |
US20190101701A1 (en) * | 2016-03-24 | 2019-04-04 | Sumitomo Electric Industries, Ltd. | Optical connector ferrule, optical connector, and optical coupling structure |
US10901156B2 (en) * | 2016-09-27 | 2021-01-26 | Afl Telecommunications Llc | Optical fiber adapters and connectors having wavelength filtering components |
US10473860B1 (en) * | 2018-05-11 | 2019-11-12 | Alliance Fiber Optic Products, Inc. | Compact devices for multiplexing applications |
Also Published As
Publication number | Publication date |
---|---|
EP0957379A3 (en) | 2003-01-15 |
EP0957379A2 (en) | 1999-11-17 |
JPH11326641A (en) | 1999-11-26 |
DE69924051T2 (en) | 2006-05-11 |
DE69924051D1 (en) | 2005-04-14 |
EP0957379B1 (en) | 2005-03-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6280099B1 (en) | Optical fiber wavelength filter and manufacturing method for the same | |
CA2569263C (en) | Optical ferrule | |
US6600855B2 (en) | Reflection suppression in multiple-reflector collimation system | |
US6343166B1 (en) | Three-port filter and method of manufacture | |
EP0738909A1 (en) | Optical fibre ferrule and optical coupler constructed using the optical fibre ferrule | |
US10816735B2 (en) | Lensed connector ferrule assemblies and methods of fabricating the same | |
JPH0552925B2 (en) | ||
EP0399684B1 (en) | Laser pigtail assembly and method of manufacture | |
US4636030A (en) | Optical alignment apparatus utilizing prismatic elements | |
US4732452A (en) | Optical connectors | |
EP0190146A1 (en) | Plural-channel optical rotary joint. | |
US6934087B1 (en) | Fiber optic collimator and collimator array | |
US7046877B2 (en) | Optical module | |
KR20010022335A (en) | Planar optical device connector and method for making same | |
JP4012537B2 (en) | Optical module and manufacturing method thereof | |
JP3906104B2 (en) | Optical device | |
JP3266424B2 (en) | Optical waveguide module | |
WO2002056076A2 (en) | Fiber optic collimator array | |
JP3329951B2 (en) | Connection structure between optical element and optical component for connection | |
US6666588B1 (en) | Collimator array having precisely aligned optical beams and method of assembling same | |
JP3132855B2 (en) | Optical coupler and coupling method thereof | |
JPH07261055A (en) | Coupling structure of optical fiber and optical waveguide | |
CA1241412A (en) | Method of splicing fiber optic cable | |
JPH04116608A (en) | Optical connector | |
JP2002107564A (en) | Optical waveguide module |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SEIKOH GIKEN CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WU, YUYING;REEL/FRAME:009364/0664 Effective date: 19980608 |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20090828 |